Wood Piano Desk Knobs Unfinished with Screws - 1 Pair - Furniture Repair Unfinished Wood Piano Desk Knob - Set of 2 - Brown Mahogay Screws included to attach to the keyboard cover of your piano Knob measures 5/8" in height; 5/8" in diameter. Screw lenth is 1/2" Designed for pianos, can be used for other furniture as well Furniture Repair